<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        div{
            width: 400px;
            height: 400px;
            background: red;
            /* display: none */
            visibility: hidden;
        }
    </style>
</head>
<body>
    <div></div>
    111
</body>
</html>
<!-- 
    让元素消失隐藏属性:
        - display:none 删除html结构
        - visibility: hidden 删除的是在浏览器里面显示方式
 -->